Inject Dependencies into Command Settings

[wbaldoumas]

I have a CommandSettings class that has a file path property. I'd like to validate that this settings object received a valid file path for an existing file, so it needs to interact with the local file system.

I was planning on injecting an IFile from the System.IO.Abstractions package rather than using the File static class and methods in order to make my settings class more testable, but even after configuring an ITypeRegistrar with the necessary dependencies, I'm unable to resolve my settings class when the program is run.

Is this kind of scenario of injecting dependencies into a CommandSettings class supported?

[wbaldoumas]

This was resolved with a pretty simple fix. I had forgotten that the actual settings class also needs to be registered:

public static class TypeRegistrarConfigurator
{
    public static ITypeRegistrar ConfigureTypeRegistrar()
    {
        var serviceCollection = new ServiceCollection();

        serviceCollection.AddSingleton<IFileSystem, FileSystem>();
        serviceCollection.AddSingleton<IFile, FileWrapper>();
        serviceCollection.AddTransient<ConvertSettings>(); // adding this fixed things

        return new TypeRegistrar(serviceCollection);
    }
}

Leaving this up in case it helps anyone else. 😄